As beings of free will Angels sometimes
choose to leave God. Others are cast from Heaven for breaking Gods
laws. They are called the Fallen Angels, Dark Angels, or the most notoriously
evil entities in all of reality known as Demons. Many Angels are in fact humans ascended to Angelhood. Those
souls judged to be evil are given the choice to be blinked out of
existence or join the demonic ranks if accepted. A rare few are so
evil that their soul is born in hell as natural born Demons. Some of
the most evil and bloodthirsty humans in history including serial killers
may in fact have had demonic souls.
Demons dispense powers of evil to lower supernatural entities
who choose to follow the dark path against God, and all that is good.
Upon choosing demonhood Angels who fall from grace loose some of their power that was originally
imbued to them by God and they become imperfect in nature. They generally
go to a realm existing in a higher dimension of pure thought closer to the
physical Universe. The place usually referred to as hell exists in the 5th
dimension. There's also a link with the physical world
in a place deep underground called the Underworld. In hell demons usually follow the first fallen angel who was in
fact the only Archangel to fall from God's grace. He is the one
known as Lucifer or the Devil. Demons do not enjoy the protection and power
derived from a God as Angels do. However the Archdemon command collective consciousness
is a formidable power base for a demon to draw from. When we refer to God we're
speaking of the God of this Omniverse and/or possibly the original eternal
God of the Macroverse. Gods of Universes aren't to be mixed up with
the lower Gods such as Greek, Roman, Pagan, etc who can be evil and
sometimes even become demons when not enough humans believe in them and
worship them anymore. Also in some cases ancient Gods were in fact
fallen Angels freelancing, and following their own path of evil.
right circumstances Demons can interact with this world by simply
attempting to influence peoples minds, possessing them, manifesting as
dangerous poltergeists, and even in some cases materializing in a
biological form. Angels battle to stop this but demons can be damn
sneaky at eluding the warriors of God.